making diffs on LDAP

[Mark W. <mew...@un...>]

> 
> A ->diff() method would be cool:
> 
> 	my $old_entry = $l->read( $dn );
> 	my $new_entry = $ldif->read();
> 	my $changes_entry = $old_entry->diff( $new_entry );
> 	$changes_entry->update( $l );	# Maps down to a ->modify() call

I (and one other person on the list) started banging on a diff method a
while back.

The basics are easy. It's hard when you have a multivalued. The old entry
contains:
  ou=people,untfs,acs

and lets say the person changes jobs, but the ou update only reflects this
new position change like this:
   ou=coe

and let's say that the person who made the change wants the new entry to
have an ou of:
    ou=people,untfs,coe

how would you know in your diff to either replace the existing multi-value
with the new single value, or to simply tag it on at the end?

Mark